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Tanya [424]
3 years ago
6

How many solutions exist for this equation 12x + 1 = 3(4x + 1) – 2

Mathematics
1 answer:
Sati [7]3 years ago
3 0

Answer:

Infinitely many

Step-by-step explanation:

12x+1=3(4x+1)-2

12x+1=12x+1

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Answer:

9/10 or 0.9

Step-by-step explanation: hope this helps

3 0
3 years ago
1. The national mean (μ) IQ score from an IQ test is 100 with a standard deviation (s) of 15. The dean of a college wants to kno
Nat2105 [25]

Answer:

We conclude that the mean IQ of her students is different from the national average.

Step-by-step explanation:

We are given that the national mean (μ) IQ score from an IQ test is 100 with a standard deviation (s) of 15.

The dean of a college want to test whether the mean IQ of her students is different from the national average. For this, she administers IQ tests to her 144 students and calculates a mean score of 113

Let, Null Hypothesis, H_0 : \mu = 100 {means that the mean IQ of her students is same as of national average}

Alternate Hypothesis, H_1 : \mu\neq 100  {means that the mean IQ of her students is different from the national average}

(a) The test statistics that will be used here is One sample z-test statistics;

               T.S. = \frac{Xbar-\mu}{\frac{s}{\sqrt{n} } } ~ N(0,1)

where, Xbar = sample mean score = 113

              s = population standard deviation = 15

             n = sample of students = 144

So, test statistics = \frac{113-100}{\frac{15}{\sqrt{144} } }

                             = 10.4

Now, at 0.05 significance level, the z table gives critical value of 1.96. Since our test statistics is more than the critical value of z which means our test statistics will fall in the rejection region and we have sufficient evidence to reject our null hypothesis.

Therefore, we conclude that the mean IQ of her students is different from the national average.

3 0
3 years ago
PLEASE HELP ME I GIVE THE BRAINLIEST
Tems11 [23]

Answer:

what grade you in

Step-by-step explanation:

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7 0
3 years ago
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Which numeral represents a larger quantity?<br> 10.2 base ten or 10.7 base eight
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You would need to explain base ten and base 8 
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Which graph represents a function?
Roman55 [17]

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Graph B represents a function.

Step-by-step explanation:

Graph B is a quadratic function. y = x^2

5 0
3 years ago
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